Chemical fire-extinguisher



(No Model.) 2 Sheets-Sheet 1.

' A. DURAND.

OHEM IGAL FIRE EXTINGUISHER.

N0. 4.32.482. Patented July 15, I890.

THE NORRIS re'rmi co, wnurmu'mm, wmumcn'cn, E. c.

(No Model.) 2 Sheets-Shet 2.

A. DURAND; CHEMICAL FIRE EXTINGUISHER.

Patented July 15, 1890 v Q i R u i i n4: NORRIS FEYERS cm. workman, WASNINGYON, n, c,

UNITED STATES PATENT OFFICE.

ARTHUR DURAND, OF \VASIIINGTON, DISTRICT OF COLUMBIA, ASSIGNOR TO JAMES M. TINKER, OF SAME PLACE, AND THOMAS B. EDELIN, OF BROOKLYN, NElV YORK.

CHEMICAL FIRE-EXTINGUISHER.

SPECIFICATION forming part of Letters Patent No. 432,482, dated July 15,1890. Application filed March 12, 1890. Serial No. 343,586- (No model.)

To all whom, it may concern: in any other suitable manner within the cyl-.

Be it known that I, ARTHUR DURAND, a inder. It is flexibleand preferably eoncavocitizen of the Republic of France, residing at convex toward the screw, and it may have \Vashington, District of Columbia, have inconcentric corrugations thereon for giving it 5 vented a new and useful Improvement in additional strength and elasticity, as by this Chemical Fire-Extinguishers, of which the means a greater degree of elasticity is 01)- following is a specification. tained.

The object of thisinvention is to provide a WVithin the cylinder, and nearits lowerside, chemical fire-extinguisher which will be airis a dischargetube P. This tube has a short [0 tight in all its details and which will present inclined arm a rigidly secured nearits lower no passages through which gas or fluid can end. Upon the free end of this arm is a cenescape save through the channel provided trally pivoted lever F,the upper end of which therefor, thereby securing the best possible is provided with aconical stud or boss f. The results from the device while in action. lower end of the lever forms a valve which 15 It further consists in such details of concloses the inner end of the tube P.

struction as will be more particularly set forth Upon the tube P, at a suitable distance from in the specification and pointed out in the its inner end, is fixed a clamping-frame I, claims. which is in turn braced by the strut I, which In the drawings which form a part of this is also fixed to the pipe I, though a bearing 20 application,Figure 1 is a longitudinal section may be found for this at any other point of my improved fire-extinguisher for hand within the cylinder. Beneath the tube? is a use. Fig.2 is a longitudinal section showing spiral spring L, which has one end fixed to a modification of the parts thereof designed the lower terminal of the clampingframe I. for heavy work. Fig. 3 is an elevation on line The opposite end of this spring is connected :5 a: on, Fig. 1, showing the spring pawl-andto the valve F and serves to keep it normally ratchet mechanism for controlling the leverclosed over the end of tube I, with which it actuating screw; and Fig. at is a front elevaengages. tion of the escape or relief valve. lVithin the forks of the clamping-frame 1 Referring to the draWings,A represents the is a glass bulb II, which is provided with a 0 casing or cylinder, which tapers slightly toneck, the prolongation of which is inserted ward its outer end. B is the rear or butt plate in the metallic tube N, which is suitably thereof, within which the screw E is located. flared to receive it. This tube N engages So This screw has its bearing rigidly secured to with the stud f on the lever F, and it is sussaid plate, and the screw is rotatably fixed tained in a fixed horizontal position between 3 5 therein in any suitable manner. Surroundthe bulb and the lever by the neck and boss, ing this screw near the shank portion and inrespectively. The outer end of the pipe I tegral therewith is a ratchet c, having any derests in a recess in adisk O, which forms the sired number of teeth, (four, as shown, being outer head of the casing or cylinder. This preferable,) and surrounding these in turn is a disk has an orifice which registers with the 40 spring-pawl e, which engages with one of the end of the tube P, and through this passes teeth of the ratchet, and this assures the rothe fire-extinguishing compound when the tation of the screw, in but one direction. device is in service. On this disk is located lVithin the butt-plate B is located the diaa discharge or relief valve R. This is in the phragm C. Thislregard as avery important form of a strut-spring e, the one end of 45 and essential feature of my invention,as will which is secured to the disk, the other free I be shown later on. The diaphragm is made end being provided with a valve r, of rubber of metal and is rigidlysecured to theinturned or other suitable material. This valve is fiangef of the butt-plate, or it may be secured normally seated in the orifice r, and it serves to relieve the cylinder of its pressure if in handling or shipping the glass bulbs should break. A

In Fig. 2 is shown a modification of the construction, which is designed for heavier work. This shows a duplication of thebulbs, bosses, and pipes connecting the same, the difference in this case being that a certain amount of pressure exerted on the lever will crush one bulb, while a greater pressu re thereon through the screw will crush the other also. Ky this arrangement a constant and equal flow of the compound is assured from cylinders of greater capacity. The pipe P in this instance has an upwardly-curved prolongation, which serves as a brace therefor. In this view, Fig. 2, it will be observed that the diaphragm C is interposed between a collar '1 on the cylinder and l the butt-plate, aml that it is provided with suitable packing and that all the parts are united by bolts and nuts \V. The bulbs ll. are incased in suitable foraminous or perforated textile material. This serves to retard the flow of the chemical contained in the bulb and prevents it mingling too rapidly with that which is contained in the cylinder, and thereby secures a uniform pressure and discharge. It also prevents broken pieces of the bulb clogging the working part of the device.

Any of the well-known chemical agents may be employed to form a compound for use in this machine.

The operation is very simple. A slight pressure exerted on the screw IE will force it forward against the diaphragm. This in turn will bear against the lever F, carrying for ward the boss or stud f, and with it the tube N. This crushes the bulb, and upon its collapse the contained liquid is free to mingle with that in the cylinder. As the upper end of the lever moves forward, the lower or valve end is thrown back and a ready passage for the compound is found in thepipe I. A cover of paper or other suitable material is placed over the relief-"alve mechanism, as is shown at (1. This serves to conceal that part of the mechanism and yet leaves the overflow contained in the cylinder to find a ready exit.

Various changes and modifications will suggest themselves which will not be a departure from the spirit of my invention. These I have not deemed necessary to illustrate or describe.

Having thus described my invention, what; I deem to be new, and desire to secure by Letters Patent, is-

1. A chemical fire-extinguisher cylinder having a butt-plate, a flexible diaphragm within the cylinder and contiguous to said butt-plate, a frangible bulb and its crushing mechanism located in advance of the diaphragm, and mechanism foractnating the diaphragm and through it the bulb-crushing mechanism.

2. A chemical fire-extinguisher cylinder having a butt-plate, a concave-convex diaphragm located in advance of thesame, a frangible bulb and its crushing mechanism supported in advance of the diaphragm, and mechanism in the rear of the diaphragm and located in the butt-plate for actuating the diaphragm and through it the bulb-crushing mechanism.

A chemical fire-extinguisher cylinder having a flexible diaphragm therein and means from without engaging the same to actuate it and thereby crush a frangible bulblocatcd in advance of said diaphragm.

l. A chemical lire-extinguisher cylinder having a butt or rear pl ate, a diaphragm within the same in advance of the butt-plate, a screw operating through said plate and against said diaphragm, a bulb supported in advance ol said diaphragm, and a lever pivoted within the cylinder and engaging the bulb with one of its arms, the opposite arm thereof being provided with a valve, which is normally seated in the escape-pipe.

5. In combination with a chemical lire-extinguisher cylinder having a butt-plate, a flexible diaphragm, and suitable bulb-crushing mechanism therein, an escape-pipe having an arm secured to its inner end, a centially-pivoted lever on said arm, said lever having a valve at one end for engaging the inner end of the escape-pipe, and a stud or boss at its opposite end.

6. In a chemical fire-extinguisher, the combination of a cylinder having a butt-plate, a screw rotatively fixed therein, a flexible diaphragm within the cylinder, and with which the screw engages, an escape-pipe within said cylinder, an arm secured to the inner end of said pipe, a lever centrally pivoted thereto, one end of said lever being provided with a valve for closing the inner end of the escapepipe, its opposite end being provided with a boss or projection which enters and supports the tube, the opposite end of said tube supporting the neck of the bulb, and whereby said bulb is crushed, and a spring for holding the valve in the escape-pipe normally closed.

ARTHUR DURANI). Witnesses:

WM. IT. Barns, WM. M. RnvNoLos. 

